Strainer for filters.



No. 815, 290.- PATENTED MAR. 13, 1906.

J.. B. GREEEL' STRAINBR P03 FILTERS; APPLICATION FILED APB:. 29, 1904 mhm wmm all/165585 UNITED s rATEs NT cr m-11;:

J MES BOYD 'GFREER, 'OFIPIITTSBURG, PENNSYLVANIA, ASS-IGNORHTO GREER FILTER COMPANY, OF PHILADELPHIA, PENNSYLVANIA, A

CORPORATION OF PENNsYLvANlAi l STRAINERFOB FILTERS.

and'useful Improvement in Filters, of which th'e'following is afull, clear, and exact descri tion.-,

y in'ventionTelates to improvements in filters; and it'consists inthe combination,

with the filtering material, of a strainer composedof a series of rings having interipr supports and spaces between the rings and a solid or imp'erforate head. I This strainer is adapted to be used in'filtersboth as a strainer'properor collector and also in washing or cleaning the-filter, .in whichlatter operation the water enters through the strainer and then passes out laterally therefrom: into the filtering material; and'the object of the invention is to provide a strainer which in washing the filter will allow the water to pass freely into the filtering material and yet' in such manner as not to cut channels therein.

I will now describe my invention so that;

others skilled in the art may manufacture and use the same, reference being'had .to the accompanying drawings forminga part of this specification, in which the other an Figure 1] is a vertical sectional View of my improved strainer. Fig. 2 is a side elevation of the same. Fig.3 is a horizontal sectional view,-andFig. ids a vertical sectional view of a portion of a filter provided with myimproved strainer.

Like symbols ofreference indicate like My improved strainer is composed of a series of superim osed rings 2, placed one above concentric with each other, i

there being a s ace 3 between each of these rings thronghw iclrt'he water maypass freely into the body of thefilter. On top, of these portionby means of which the strainer may ter'or is supplied to the filter in washing, or it i may be so inserted in. the fiooringofthefilterchamber as to communicate with achamber 5 and to discharge the water when washing the filter intoxthe-body ofgravel, sand, or

other filteringmaterial Insidcol' the rings ngs;2;is-a dome-shaped solid-head 4. At the base of the 'rings s a suitable threaded 4 Specification of Letters Patent. Patented March 13,1906. Application filed April 29,1904. Serial n. 205,464.

. are supporting-fibs'i', which are of small :area in cross-section and the corners of which are preferably rounded, so that the water as it passes'through the body of the strainer and the spaces between the rings 2 will pass out around the entire periphery of the strainer.

. 7131c purpose of this construction is to prevent .t e" 1 into 'ets, which'would soon cut, channels in i the fi teringrnaterial which-is packed around The function of the dome- 0w of water from being concentrated the strainer. I shaped solid head is to deflect thewater-and to cause. an even and regular flow throughall I portions of .the spaces or orifices betweenthe rings, .These strainers maybe arranged within the 1 p body of the filter in any manner desired, either by opening directl into the water-pipes or into the floor of, t e water'echamber, as. is

shown in the drawings, while-the bodies of the strainersextend up into. the,- filtering ma:

g A v .75 In the manufacture of these strainers I preterial. I

fer to cut them out of a solid iec e ofbrass'or other material, care being ta en to have the annular-groovcs or spaces between the rings 5 of such epth as to allow the water to-pa'ss from these orifices in solid sheets that is, the groove should be 'sufiieient in depth to allow "the water divided by the; supporting-ribs .to

unite before it passes into thefiltering'mate 7 rial. I do not desire,however, to. limit m self tothis method-of manufacture, as t e get or by supporting-ribs, which in jturn rin s might be formed's'eparately,united to-- 7- would be'secured to-the base'and head, or

the base, head, and supporting-ribs maybe formed of a single piece and the rings secured thereto.

Although I have s oken of rings. and 1 Y strainer cylindrical in orm', I do not desire to limit myself to this orany other shape, although such shape is preferable, it being best adapted. to cause an even distribution of the water about the strainer.

. Theadvantagesof my invention will be appreciated by those skilled in the art. "Owing to the fact that the orifices through which the water passes into the filtering material are continuous and owing to the solid dome I shaped head, the water -is caused to pass; evenly into the filtering material.

Another advantage of l l I myimproveinent-is "I claim, and desire to not apt to be fille or clogged by the filtering points of contact, one above and one below, and the filtering material is therefore not liable. to become fixed in the spaces. Having thus described my invention, what secure by Letters Patent i f 1. .The combination with a filtering-bed composed of granular material, of a strainer embedded'in said material'and comprising a series of superposedseparatedrings' and an imperforate' dome-shapedzhead forming a hollow chamber, said ringsbeing supported at their inner edges so asto form continuous "spaces between the rings at their outer edges,

1 and 'a'water connection at the bottom of the as described. material, for the reason that there are but two trainer and opposite the head, substantially ,2. The combination with a filtering-bed composed of granular material, of a strainer embedded in said material and comprising a SIlGS of superposed separated rings and intorior ribs for supporting the rings at their inner e'dges'so as to form continuous spaces between the rings at their outer edges, and a solid or imperforate head, substantially as described. I k

y In testimony whereof I have hereunto set .my hand. i

i JAMES BOYD GREEK. Witnesses:

WM. M. ROBINSON, STANLEY M. LANGDON. 

